In a closet in the aft cabin in my 1995 carver 355 there are 4 coax connections. One is a new run from the coax input on the exterior of the boat and one goes to the tv console in the salon. The other two are a mystery to me. Maybe one is from the original wiring from the exterior and the other is to an external antenna? Any ideas?
I'd say you're right on target. Obviously you've got a new and old cable to the external source, one to the salon TV and the forth would probably be to an antenae although it could have been set up for another TV in the aft cabin or on deck.